I've read some of the mangas, loved the anime and always thought that replicas of the Dragonballs would be a PITA as you don't really have a scale. In Son Goku's hands (when he's young) they seem very big, bigger than a baseball or something, but in Piccolo's hands they look ridiculously tiny. But yours looks pretty good.
But just a question, is it the picture, or are the stars really black? I had in mind that they are yellow